| Tenmars | ST-501 | Indoor Air Quality Monitor |  | |
| Tenmars | ST-502 | Desktop Indoor Air Quality (IAQ) Monitor | | |
| Tenmars | TM-186D | Large LED Screen CO2/Temp/RH Monitor with Data Logger | | |
| Tenmars | TM-186D | Large LED Screen CO2/Temp/RH Monitor with Data Logger | | |
| Tenmars | TM-187A | CO2/Temp/RH Monitor | | |
| Tenmars | TM-187D | Large LED Screen CO2/Temp/RH/Humidity Monitor with Data Logger | | |
| Tenmars | TM-187D | Large LED Screen CO2/Temp/RH/Humidity Monitor with Data Logger | | |